© 2006 Wohler Technologies Inc. ALL rights reserved
4
AMP2A
and
AMP2A-2S
User Manual P/N
821553
Rev-
B
Features
AMP2A and AMP2A-2S
Description
Section 1: General Features and Specifications
AMP2A-2S Front Panel
The
AMP2A Series
units are complete, exceptionally high quality stereo audio monitoring systems in compact, two rackspace
cabinets. These models contain three audiophile-quality drivers and three power amplifiers; two amplifiers (and two speakers) that
reproduce midrange and high frequency information in stereo, and a third amp/driver combination (and speaker) that handles
summed Low Frequency (LF) information below the 500 Hz crossover point. The
AMP2A Series
unique audio design has two
important advantages. First, it provides optimally focused sound in an Ultra Near Field
tm
(1 to 3 feet) environment. This allows
higher SPL for the operator while reducing overall ambient sound and adjacent bay crosstalk. Second, electronic rather than
acoustic cancellation of bass frequencies provides positive audible detection of reversed polarity (“out of phase”) audio feeds. A
unique LED display also visually shows “phase” (polarity) relationships of the signals selected for monitoring.
The
AMP2A
and
AMP2A-2S
models are both audio monitors capable of monitoring two analog source channels through the stereo
speaker system while simultaneously visually monitoring both channels via two 20-segment tri-color LED bargraph level meters.
The
AMP2-2S
model features a toggle switch on the front panel to allow selection of an additional pair of analog input sources.
The rear panel for the
AMP2A
model features two analog inputs on balanced XLR and unbalanced RCA connectors and two loop-
through outputs on XLR connectors. The rear panel for the
AMP2A-2S
model features two selectable pairs of analog inputs on XLR
inputs and a stereo output of the selected sources on two XLR connectors.
2U Stereo Audio Speaker Monitors
• 98 dB SPL at two feet
• Only two rack spaces high
• Excellent high frequency response for positive detection of
background whine and noise
• Audible indication of phase/polarity problems
• Thorough magnetic shielding for placement next to video
monitors
• Numerous alternate control and input options
• Quick and easy installation: simply slide in the rack and
connect audio and AC power
• AMP2A model features balanced analog inputs on XLR
connectors and unbalanced inputs on RCA connectors with
loop-through outputs on XLR connectors
• AMP2A-2S model features two selectable pairs of balanced
analog inputs on XLR connectors with two outputs of the selected
source on XLR connectors
• AMP2A-2S model offers front panel switching between the two
stereo inputs
• Two 20-segment LED bargraph display level meters
• Volume and balance controls
• Stereo phase indication LEDs
• Headphone output
• Power indication LED
AMP2A Front Panel
AMP2A
MONITOR PANEL
ANALOG AUDIO
3
28
31
40
37
34
L
R
10
19
16
22
13
25
7
5
SOURCE
PEAK
2
1
1
0
3
WOHLER
TECHNOLOGIES
FAST-IN
PHASE
FAST-OUT
POWER
AVG
WOHLER
TECHNOLOGIES
1
R
L
22
25
34
37
40
31
28
13
16
19
10
5
7
3
POWER
PEAK
SOURCE
3
0
1
2
FAST-IN
PHASE
FAST-OUT
ANALOG AUDIO
MONITOR PANEL
AMP2A-2S
SOURCE
2
1
AVG
